如何在没有延迟的情况下从Win32中的另一个进程捕获stdout？

HANDLE hReadPipe, hWritePipe;
CreatePipe(&hReadPipe, &hWritePipe, NULL, 0);

HANDLE hPipe = CreateNamedPipe(TEXT("\\\\.\\pipe\\PipeName"),
                               PIPE_ACCESS_DUPLEX,
                               PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT,
                               PIPE_UNLIMITED_INSTANCES,
                               BUFFER_SIZE,
                               BUFFER_SIZE,
                               0,
                               NULL);

STARTUPINFO si;
ZeroMemory(&si, sizeof(si));
si.cb = sizeof(si);
si.dwFlags = STARTF_USESTDHANDLES;
si.hStdOutput = hWritePipe;
si.hStdError = hWritePipe;

CreateProcess(NULL,
              lpCommandLine,
              NULL,
              NULL,
              TRUE,
              0,
              NULL,
              NULL,
              &si,
              &pi);

DWORD dwRead;
CHAR chBuf[BUFFER_SIZE];

ReadFile(hReadPipe, chBuf, BUFFER_SIZE - 1, &dwRead, NULL);

CloseHandle(hReadPipe);
CloseHandle(hWritePipe);